asp.net mvc - 503 (Service Unavailable) - IIS 7.5 deployed MVC web application -


every 24 hours or so, receive 503 our iis 7.5 web server hosts our mvc application.

i read related articles , checked if application pool/identity had necessary permissions , part of iis_usr (or whatever called) group.

the event log reports asp.net worker process crashed. information event log:

log name:      application source:        application error date:          5/14/2013 11:15:58 pm event id:      1000 task category: (100) level:         error keywords:      classic user:          n/a computer:      server_machine_name description: faulting application name: w3wp.exe, version: 7.5.7601.17514, time stamp: 0x4ce7a5f8 faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000 exception code: 0x00000000 fault offset: 0x1ccbc2de faulting process id: 0x2640 faulting application start time: 0x01ce51338e238a4b faulting application path: c:\windows\syswow64\inetsrv\w3wp.exe faulting module path: unknown report id: e8120b0c-bd26-11e2-9313-001f290b5f7a event xml: <event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">   <system>     <provider name="application error" />     <eventid qualifiers="0">1000</eventid>     <level>2</level>     <task>100</task>     <keywords>0x80000000000000</keywords>     <timecreated systemtime="2013-05-15t06:15:58.000000000z" />     <eventrecordid>4265</eventrecordid>     <channel>application</channel>     <computer>server_machine_name</computer>     <security />   </system>   <eventdata>     <data>w3wp.exe</data>     <data>7.5.7601.17514</data>     <data>4ce7a5f8</data>     <data>unknown</data>     <data>0.0.0.0</data>     <data>00000000</data>     <data>00000000</data>     <data>1ccbc2de</data>     <data>2640</data>     <data>01ce51338e238a4b</data>     <data>c:\windows\syswow64\inetsrv\w3wp.exe</data>     <data>unknown</data>     <data>e8120b0c-bd26-11e2-9313-001f290b5f7a</data>   </eventdata> </event> 

deployment environment:

web server: iis 7.5

.net framework: v4

mvc version: 4

windows server: windows server 2008 r2 standard

help appreicated.


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